<template>
  <div>
    <nav-bar>
      <div slot="left" class="back" @click="backClick">
        <img src="@/assets/img/common/back.svg" alt="">
      </div>
      <div slot="center" class="title">
        <div v-for="(item,index) in titles"
             class="title-item"
             :class="{active: index===currentIndex}" @click="titleClick(index)">
          {{item}}
        </div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
import NavBar from "@/components/common/navbar/NavBar";
export default {
  components: {
    NavBar
  },
  data(){
    return{
      titles:['商品','参数','评论','推荐'],
      currentIndex:0
    }
  },
  methods:{
    titleClick(index){
      this.currentIndex=index
      this.$emit('offsetTop',index)
    },
    backClick(){
      this.$router.back()

    }
  },
  name: "DetailNavBar"
}
</script>

<style scoped>
  .title{
    display: flex;
  }
  .title-item{
    flex: 1;
  }
  .active{
    color: var(--color-high-text);
  }
  .back{
    margin-top: 6px;
    margin-right: 8px;
  }
</style>
